2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
60 * ECC cipher suite support in OpenSSL originally developed by
61 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
63 /* ====================================================================
64 * Copyright 2005 Nokia. All rights reserved.
66 * The portions of the attached software ("Contribution") is developed by
67 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
70 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
71 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
72 * support (see RFC 4279) to OpenSSL.
74 * No patent licenses or other rights except those expressly stated in
75 * the OpenSSL open source license shall be deemed granted or received
76 * expressly, by implication, estoppel, or otherwise.
78 * No assurances are provided by Nokia that the Contribution does not
79 * infringe the patent or other intellectual property rights of any third
80 * party or that the license provides you with all the necessary rights
81 * to make use of the Contribution.
83 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
84 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
85 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
86 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
91 #include <openssl/objects.h>
92 #include <openssl/comp.h>
95 #define SSL_ENC_DES_IDX 0
96 #define SSL_ENC_3DES_IDX 1
97 #define SSL_ENC_RC4_IDX 2
98 #define SSL_ENC_RC2_IDX 3
99 #define SSL_ENC_IDEA_IDX 4
100 #define SSL_ENC_eFZA_IDX 5
101 #define SSL_ENC_NULL_IDX 6
102 #define SSL_ENC_AES128_IDX 7
103 #define SSL_ENC_AES256_IDX 8
104 #define SSL_ENC_NUM_IDX 9
105 #define SSL_ENC_CAMELLIA128_IDX 9
106 #define SSL_ENC_CAMELLIA256_IDX 10
107 #undef SSL_ENC_NUM_IDX
108 #define SSL_ENC_NUM_IDX 11
111 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={
112 NULL,NULL,NULL,NULL,NULL,NULL,
115 #define SSL_COMP_NULL_IDX 0
116 #define SSL_COMP_ZLIB_IDX 1
117 #define SSL_COMP_NUM_IDX 2
119 static STACK_OF(SSL_COMP) *ssl_comp_methods=NULL;
121 #define SSL_MD_MD5_IDX 0
122 #define SSL_MD_SHA1_IDX 1
123 #define SSL_MD_NUM_IDX 2
124 static const EVP_MD *ssl_digest_methods[SSL_MD_NUM_IDX]={
129 #define CIPHER_KILL 2
132 #define CIPHER_SPECIAL 5
134 typedef struct cipher_order_st
139 struct cipher_order_st *next,*prev;
142 static const SSL_CIPHER cipher_aliases[]={
143 /* Don't include eNULL unless specifically enabled. */
144 /* Don't include ECC in ALL because these ciphers are not yet official. */
145 {0,SSL_TXT_ALL, 0,SSL_ALL & ~SSL_eNULL & ~SSL_kECDH & ~SSL_kECDHE, SSL_ALL ,0,0,0,SSL_ALL,SSL_ALL}, /* must be first */
146 /* TODO: COMPLEMENT OF ALL and COMPLEMENT OF DEFAULT do not have ECC cipher suites handled properly. */
147 {0,SSL_TXT_CMPALL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0}, /* COMPLEMENT OF ALL */
148 {0,SSL_TXT_CMPDEF,0,SSL_ADH, 0,0,0,0,SSL_AUTH_MASK,0},
149 {0,SSL_TXT_kKRB5,0,SSL_kKRB5,0,0,0,0,SSL_MKEY_MASK,0}, /* VRS Kerberos5 */
150 {0,SSL_TXT_kRSA,0,SSL_kRSA, 0,0,0,0,SSL_MKEY_MASK,0},
151 {0,SSL_TXT_kDHr,0,SSL_kDHr, 0,0,0,0,SSL_MKEY_MASK,0},
152 {0,SSL_TXT_kDHd,0,SSL_kDHd, 0,0,0,0,SSL_MKEY_MASK,0},
153 {0,SSL_TXT_kEDH,0,SSL_kEDH, 0,0,0,0,SSL_MKEY_MASK,0},
154 {0,SSL_TXT_kFZA,0,SSL_kFZA, 0,0,0,0,SSL_MKEY_MASK,0},
155 {0,SSL_TXT_kPSK,0,SSL_kPSK, 0,0,0,0,SSL_MKEY_MASK,0},
156 {0,SSL_TXT_DH, 0,SSL_DH, 0,0,0,0,SSL_MKEY_MASK,0},
157 {0,SSL_TXT_ECC, 0,(SSL_kECDH|SSL_kECDHE), 0,0,0,0,SSL_MKEY_MASK,0},
158 {0,SSL_TXT_EDH, 0,SSL_EDH, 0,0,0,0,SSL_MKEY_MASK|SSL_AUTH_MASK,0},
159 {0,SSL_TXT_aKRB5,0,SSL_aKRB5,0,0,0,0,SSL_AUTH_MASK,0}, /* VRS Kerberos5 */
160 {0,SSL_TXT_aRSA,0,SSL_aRSA, 0,0,0,0,SSL_AUTH_MASK,0},
161 {0,SSL_TXT_aDSS,0,SSL_aDSS, 0,0,0,0,SSL_AUTH_MASK,0},
162 {0,SSL_TXT_aFZA,0,SSL_aFZA, 0,0,0,0,SSL_AUTH_MASK,0},
163 {0,SSL_TXT_aPSK,0,SSL_aPSK, 0,0,0,0,SSL_AUTH_MASK,0},
164 {0,SSL_TXT_aNULL,0,SSL_aNULL,0,0,0,0,SSL_AUTH_MASK,0},
165 {0,SSL_TXT_aDH, 0,SSL_aDH, 0,0,0,0,SSL_AUTH_MASK,0},
166 {0,SSL_TXT_DSS, 0,SSL_DSS, 0,0,0,0,SSL_AUTH_MASK,0},
168 {0,SSL_TXT_DES, 0,SSL_DES, 0,0,0,0,SSL_ENC_MASK,0},
169 {0,SSL_TXT_3DES,0,SSL_3DES, 0,0,0,0,SSL_ENC_MASK,0},
170 {0,SSL_TXT_RC4, 0,SSL_RC4, 0,0,0,0,SSL_ENC_MASK,0},
171 {0,SSL_TXT_RC2, 0,SSL_RC2, 0,0,0,0,SSL_ENC_MASK,0},
172 #ifndef OPENSSL_NO_IDEA
173 {0,SSL_TXT_IDEA,0,SSL_IDEA, 0,0,0,0,SSL_ENC_MASK,0},
175 {0,SSL_TXT_eNULL,0,SSL_eNULL,0,0,0,0,SSL_ENC_MASK,0},
176 {0,SSL_TXT_eFZA,0,SSL_eFZA, 0,0,0,0,SSL_ENC_MASK,0},
177 {0,SSL_TXT_AES, 0,SSL_AES, 0,0,0,0,SSL_ENC_MASK,0},
178 {0,SSL_TXT_CAMELLIA, 0,SSL_CAMELLIA, 0,0,0,0,SSL_ENC_MASK,0},
180 {0,SSL_TXT_MD5, 0,SSL_MD5, 0,0,0,0,SSL_MAC_MASK,0},
181 {0,SSL_TXT_SHA1,0,SSL_SHA1, 0,0,0,0,SSL_MAC_MASK,0},
182 {0,SSL_TXT_SHA, 0,SSL_SHA, 0,0,0,0,SSL_MAC_MASK,0},
184 {0,SSL_TXT_NULL,0,SSL_NULL, 0,0,0,0,SSL_ENC_MASK,0},
185 {0,SSL_TXT_KRB5,0,SSL_KRB5, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
186 {0,SSL_TXT_RSA, 0,SSL_RSA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
187 {0,SSL_TXT_ADH, 0,SSL_ADH, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
188 {0,SSL_TXT_FZA, 0,SSL_FZA, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK|SSL_ENC_MASK,0},
189 {0,SSL_TXT_PSK, 0,SSL_PSK, 0,0,0,0,SSL_AUTH_MASK|SSL_MKEY_MASK,0},
191 {0,SSL_TXT_SSLV2, 0,SSL_SSLV2, 0,0,0,0,SSL_SSL_MASK,0},
192 {0,SSL_TXT_SSLV3, 0,SSL_SSLV3, 0,0,0,0,SSL_SSL_MASK,0},
193 {0,SSL_TXT_TLSV1, 0,SSL_TLSV1, 0,0,0,0,SSL_SSL_MASK,0},
195 {0,SSL_TXT_EXP ,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK},
196 {0,SSL_TXT_EXPORT,0, 0,SSL_EXPORT, 0,0,0,0,SSL_EXP_MASK},
197 {0,SSL_TXT_EXP40, 0, 0, SSL_EXP40, 0,0,0,0,SSL_STRONG_MASK},
198 {0,SSL_TXT_EXP56, 0, 0, SSL_EXP56, 0,0,0,0,SSL_STRONG_MASK},
199 {0,SSL_TXT_LOW, 0, 0, SSL_LOW, 0,0,0,0,SSL_STRONG_MASK},
200 {0,SSL_TXT_MEDIUM,0, 0,SSL_MEDIUM, 0,0,0,0,SSL_STRONG_MASK},
201 {0,SSL_TXT_HIGH, 0, 0, SSL_HIGH, 0,0,0,0,SSL_STRONG_MASK},
204 void ssl_load_ciphers(void)
206 ssl_cipher_methods[SSL_ENC_DES_IDX]=
207 EVP_get_cipherbyname(SN_des_cbc);
208 ssl_cipher_methods[SSL_ENC_3DES_IDX]=
209 EVP_get_cipherbyname(SN_des_ede3_cbc);
210 ssl_cipher_methods[SSL_ENC_RC4_IDX]=
211 EVP_get_cipherbyname(SN_rc4);
212 ssl_cipher_methods[SSL_ENC_RC2_IDX]=
213 EVP_get_cipherbyname(SN_rc2_cbc);
214 #ifndef OPENSSL_NO_IDEA
215 ssl_cipher_methods[SSL_ENC_IDEA_IDX]=
216 EVP_get_cipherbyname(SN_idea_cbc);
218 ssl_cipher_methods[SSL_ENC_IDEA_IDX]= NULL;
220 ssl_cipher_methods[SSL_ENC_AES128_IDX]=
221 EVP_get_cipherbyname(SN_aes_128_cbc);
222 ssl_cipher_methods[SSL_ENC_AES256_IDX]=
223 EVP_get_cipherbyname(SN_aes_256_cbc);
224 ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX]=
225 EVP_get_cipherbyname(SN_camellia_128_cbc);
226 ssl_cipher_methods[SSL_ENC_CAMELLIA256_IDX]=
227 EVP_get_cipherbyname(SN_camellia_256_cbc);
229 ssl_digest_methods[SSL_MD_MD5_IDX]=
230 EVP_get_digestbyname(SN_md5);
231 ssl_digest_methods[SSL_MD_SHA1_IDX]=
232 EVP_get_digestbyname(SN_sha1);
236 #ifndef OPENSSL_NO_COMP
238 static int sk_comp_cmp(const SSL_COMP * const *a,
239 const SSL_COMP * const *b)
241 return((*a)->id-(*b)->id);
244 static void load_builtin_compressions(void)
246 if (ssl_comp_methods != NULL)
249 CRYPTO_w_lock(CRYPTO_LOCK_SSL);
250 if (ssl_comp_methods == NULL)
252 SSL_COMP *comp = NULL;
255 ssl_comp_methods=sk_SSL_COMP_new(sk_comp_cmp);
256 if (ssl_comp_methods != NULL)
258 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
261 comp->method=COMP_zlib();
263 && comp->method->type == NID_undef)
267 comp->id=SSL_COMP_ZLIB_IDX;
268 comp->name=comp->method->name;
269 sk_SSL_COMP_push(ssl_comp_methods,comp);
275 CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
279 int ssl_cipher_get_evp(const SSL_SESSION *s, const EVP_CIPHER **enc,
280 const EVP_MD **md, SSL_COMP **comp)
286 if (c == NULL) return(0);
290 #ifndef OPENSSL_NO_COMP
291 load_builtin_compressions();
295 ctmp.id=s->compress_meth;
296 if (ssl_comp_methods != NULL)
298 i=sk_SSL_COMP_find(ssl_comp_methods,&ctmp);
300 *comp=sk_SSL_COMP_value(ssl_comp_methods,i);
306 if ((enc == NULL) || (md == NULL)) return(0);
308 switch (c->algorithms & SSL_ENC_MASK)
331 case 128: i=SSL_ENC_AES128_IDX; break;
332 case 256: i=SSL_ENC_AES256_IDX; break;
333 default: i=-1; break;
339 case 128: i=SSL_ENC_CAMELLIA128_IDX; break;
340 case 256: i=SSL_ENC_CAMELLIA256_IDX; break;
341 default: i=-1; break;
350 if ((i < 0) || (i > SSL_ENC_NUM_IDX))
354 if (i == SSL_ENC_NULL_IDX)
357 *enc=ssl_cipher_methods[i];
360 switch (c->algorithms & SSL_MAC_MASK)
372 if ((i < 0) || (i > SSL_MD_NUM_IDX))
375 *md=ssl_digest_methods[i];
377 if ((*enc != NULL) && (*md != NULL))
383 #define ITEM_SEP(a) \
384 (((a) == ':') || ((a) == ' ') || ((a) == ';') || ((a) == ','))
386 static void ll_append_tail(CIPHER_ORDER **head, CIPHER_ORDER *curr,
389 if (curr == *tail) return;
392 if (curr->prev != NULL)
393 curr->prev->next=curr->next;
394 if (curr->next != NULL) /* should always be true */
395 curr->next->prev=curr->prev;
402 static unsigned long ssl_cipher_get_disabled(void)
407 #ifdef OPENSSL_NO_RSA
408 mask |= SSL_aRSA|SSL_kRSA;
410 #ifdef OPENSSL_NO_DSA
414 mask |= SSL_kDHr|SSL_kDHd|SSL_kEDH|SSL_aDH;
416 #ifdef OPENSSL_NO_KRB5
417 mask |= SSL_kKRB5|SSL_aKRB5;
419 #ifdef OPENSSL_NO_ECDH
420 mask |= SSL_kECDH|SSL_kECDHE;
422 #ifdef OPENSSL_NO_PSK
425 #ifdef SSL_FORBID_ENULL
429 mask |= (ssl_cipher_methods[SSL_ENC_DES_IDX ] == NULL) ? SSL_DES :0;
430 mask |= (ssl_cipher_methods[SSL_ENC_3DES_IDX] == NULL) ? SSL_3DES:0;
431 mask |= (ssl_cipher_methods[SSL_ENC_RC4_IDX ] == NULL) ? SSL_RC4 :0;
432 mask |= (ssl_cipher_methods[SSL_ENC_RC2_IDX ] == NULL) ? SSL_RC2 :0;
433 mask |= (ssl_cipher_methods[SSL_ENC_IDEA_IDX] == NULL) ? SSL_IDEA:0;
434 mask |= (ssl_cipher_methods[SSL_ENC_eFZA_IDX] == NULL) ? SSL_eFZA:0;
435 mask |= (ssl_cipher_methods[SSL_ENC_AES128_IDX] == NULL) ? SSL_AES:0;
436 mask |= (ssl_cipher_methods[SSL_ENC_CAMELLIA128_IDX] == NULL) ? SSL_CAMELLIA:0;
438 mask |= (ssl_digest_methods[SSL_MD_MD5_IDX ] == NULL) ? SSL_MD5 :0;
439 mask |= (ssl_digest_methods[SSL_MD_SHA1_IDX] == NULL) ? SSL_SHA1:0;
444 static void ssl_cipher_collect_ciphers(const SSL_METHOD *ssl_method,
445 int num_of_ciphers, unsigned long mask, CIPHER_ORDER *co_list,
446 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
452 * We have num_of_ciphers descriptions compiled in, depending on the
453 * method selected (SSLv2 and/or SSLv3, TLSv1 etc).
454 * These will later be sorted in a linked list with at most num
458 /* Get the initial list of ciphers */
459 co_list_num = 0; /* actual count of ciphers */
460 for (i = 0; i < num_of_ciphers; i++)
462 c = ssl_method->get_cipher(i);
463 /* drop those that use any of that is not available */
464 if ((c != NULL) && c->valid && !(c->algorithms & mask))
466 co_list[co_list_num].cipher = c;
467 co_list[co_list_num].next = NULL;
468 co_list[co_list_num].prev = NULL;
469 co_list[co_list_num].active = 0;
472 printf("\t%d: %s %lx %lx\n",i,c->name,c->id,c->algorithms);
473 #endif /* KSSL_DEBUG */
475 if (!sk_push(ca_list,(char *)c)) goto err;
481 * Prepare linked list from list entries
483 for (i = 1; i < co_list_num - 1; i++)
485 co_list[i].prev = &(co_list[i-1]);
486 co_list[i].next = &(co_list[i+1]);
490 (*head_p) = &(co_list[0]);
491 (*head_p)->prev = NULL;
492 (*head_p)->next = &(co_list[1]);
493 (*tail_p) = &(co_list[co_list_num - 1]);
494 (*tail_p)->prev = &(co_list[co_list_num - 2]);
495 (*tail_p)->next = NULL;
499 static void ssl_cipher_collect_aliases(SSL_CIPHER **ca_list,
500 int num_of_group_aliases, unsigned long mask,
503 CIPHER_ORDER *ciph_curr;
504 SSL_CIPHER **ca_curr;
508 * First, add the real ciphers as already collected
512 while (ciph_curr != NULL)
514 *ca_curr = ciph_curr->cipher;
516 ciph_curr = ciph_curr->next;
520 * Now we add the available ones from the cipher_aliases[] table.
521 * They represent either an algorithm, that must be fully
522 * supported (not match any bit in mask) or represent a cipher
523 * strength value (will be added in any case because algorithms=0).
525 for (i = 0; i < num_of_group_aliases; i++)
527 if ((i == 0) || /* always fetch "ALL" */
528 !(cipher_aliases[i].algorithms & mask))
530 *ca_curr = (SSL_CIPHER *)(cipher_aliases + i);
535 *ca_curr = NULL; /* end of list */
538 static void ssl_cipher_apply_rule(unsigned long cipher_id,
539 unsigned long algorithms, unsigned long mask,
540 unsigned long algo_strength, unsigned long mask_strength,
541 int rule, int strength_bits, CIPHER_ORDER *co_list,
542 CIPHER_ORDER **head_p, CIPHER_ORDER **tail_p)
544 CIPHER_ORDER *head, *tail, *curr, *curr2, *tail2;
546 unsigned long ma, ma_s;
549 printf("Applying rule %d with %08lx %08lx %08lx %08lx (%d)\n",
550 rule, algorithms, mask, algo_strength, mask_strength,
554 curr = head = *head_p;
556 tail2 = tail = *tail_p;
559 if ((curr == NULL) || (curr == tail2)) break;
565 /* If explicit cipher suite match that one only */
569 if (cp->id != cipher_id)
574 * Selection criteria is either the number of strength_bits
575 * or the algorithm used.
577 else if (strength_bits == -1)
579 ma = mask & cp->algorithms;
580 ma_s = mask_strength & cp->algo_strength;
583 printf("\nName: %s:\nAlgo = %08lx Algo_strength = %08lx\nMask = %08lx Mask_strength %08lx\n", cp->name, cp->algorithms, cp->algo_strength, mask, mask_strength);
584 printf("ma = %08lx ma_s %08lx, ma&algo=%08lx, ma_s&algos=%08lx\n", ma, ma_s, ma&algorithms, ma_s&algo_strength);
587 * Select: if none of the mask bit was met from the
588 * cipher or not all of the bits were met, the
589 * selection does not apply.
591 if (((ma == 0) && (ma_s == 0)) ||
592 ((ma & algorithms) != ma) ||
593 ((ma_s & algo_strength) != ma_s))
594 continue; /* does not apply */
596 else if (strength_bits != cp->strength_bits)
597 continue; /* does not apply */
600 printf("Action = %d\n", rule);
603 /* add the cipher if it has not been added yet. */
604 if (rule == CIPHER_ADD)
608 ll_append_tail(&head, curr, &tail);
612 /* Move the added cipher to this location */
613 else if (rule == CIPHER_ORD)
617 ll_append_tail(&head, curr, &tail);
620 else if (rule == CIPHER_DEL)
622 else if (rule == CIPHER_KILL)
627 curr->prev->next = curr->next;
631 if (curr->next != NULL)
632 curr->next->prev = curr->prev;
633 if (curr->prev != NULL)
634 curr->prev->next = curr->next;
644 static int ssl_cipher_strength_sort(CIPHER_ORDER *co_list,
645 CIPHER_ORDER **head_p,
646 CIPHER_ORDER **tail_p)
648 int max_strength_bits, i, *number_uses;
652 * This routine sorts the ciphers with descending strength. The sorting
653 * must keep the pre-sorted sequence, so we apply the normal sorting
654 * routine as '+' movement to the end of the list.
656 max_strength_bits = 0;
661 (curr->cipher->strength_bits > max_strength_bits))
662 max_strength_bits = curr->cipher->strength_bits;
666 number_uses = OPENSSL_malloc((max_strength_bits + 1) * sizeof(int));
669 SSLerr(SSL_F_SSL_CIPHER_STRENGTH_SORT,ERR_R_MALLOC_FAILURE);
672 memset(number_uses, 0, (max_strength_bits + 1) * sizeof(int));
675 * Now find the strength_bits values actually used
681 number_uses[curr->cipher->strength_bits]++;
685 * Go through the list of used strength_bits values in descending
688 for (i = max_strength_bits; i >= 0; i--)
689 if (number_uses[i] > 0)
690 ssl_cipher_apply_rule(0, 0, 0, 0, 0, CIPHER_ORD, i,
691 co_list, head_p, tail_p);
693 OPENSSL_free(number_uses);
697 static int ssl_cipher_process_rulestr(const char *rule_str,
698 CIPHER_ORDER *co_list, CIPHER_ORDER **head_p,
699 CIPHER_ORDER **tail_p, SSL_CIPHER **ca_list)
701 unsigned long algorithms, mask, algo_strength, mask_strength;
702 const char *l, *start, *buf;
703 int j, multi, found, rule, retval, ok, buflen;
704 unsigned long cipher_id;
716 { rule = CIPHER_DEL; l++; }
718 { rule = CIPHER_ORD; l++; }
720 { rule = CIPHER_KILL; l++; }
722 { rule = CIPHER_SPECIAL; l++; }
724 { rule = CIPHER_ADD; }
732 algorithms = mask = algo_strength = mask_strength = 0;
740 #ifndef CHARSET_EBCDIC
741 while ( ((ch >= 'A') && (ch <= 'Z')) ||
742 ((ch >= '0') && (ch <= '9')) ||
743 ((ch >= 'a') && (ch <= 'z')) ||
746 while ( isalnum(ch) || (ch == '-'))
756 * We hit something we cannot deal with,
757 * it is no command or separator nor
758 * alphanumeric, so we call this an error.
760 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
761 SSL_R_INVALID_COMMAND);
767 if (rule == CIPHER_SPECIAL)
769 found = 0; /* unused -- avoid compiler warning */
770 break; /* special treatment */
773 /* check for multi-part specification */
783 * Now search for the cipher alias in the ca_list. Be careful
784 * with the strncmp, because the "buflen" limitation
785 * will make the rule "ADH:SOME" and the cipher
786 * "ADH-MY-CIPHER" look like a match for buflen=3.
787 * So additionally check whether the cipher name found
788 * has the correct length. We can save a strlen() call:
789 * just checking for the '\0' at the right place is
790 * sufficient, we have to strncmp() anyway. (We cannot
791 * use strcmp(), because buf is not '\0' terminated.)
797 if (!strncmp(buf, ca_list[j]->name, buflen) &&
798 (ca_list[j]->name[buflen] == '\0'))
807 break; /* ignore this entry */
809 if (ca_list[j]->valid)
811 cipher_id = ca_list[j]->id;
816 * 1 - any old restrictions apply outside new mask
817 * 2 - any new restrictions apply outside old mask
818 * 3 - enforce old & new where masks intersect
820 algorithms = (algorithms & ~ca_list[j]->mask) | /* 1 */
821 (ca_list[j]->algorithms & ~mask) | /* 2 */
822 (algorithms & ca_list[j]->algorithms); /* 3 */
823 mask |= ca_list[j]->mask;
824 algo_strength = (algo_strength & ~ca_list[j]->mask_strength) |
825 (ca_list[j]->algo_strength & ~mask_strength) |
826 (algo_strength & ca_list[j]->algo_strength);
827 mask_strength |= ca_list[j]->mask_strength;
833 * Ok, we have the rule, now apply it
835 if (rule == CIPHER_SPECIAL)
836 { /* special command */
839 !strncmp(buf, "STRENGTH", 8))
840 ok = ssl_cipher_strength_sort(co_list,
843 SSLerr(SSL_F_SSL_CIPHER_PROCESS_RULESTR,
844 SSL_R_INVALID_COMMAND);
848 * We do not support any "multi" options
849 * together with "@", so throw away the
850 * rest of the command, if any left, until
851 * end or ':' is found.
853 while ((*l != '\0') && ITEM_SEP(*l))
858 ssl_cipher_apply_rule(cipher_id, algorithms, mask,
859 algo_strength, mask_strength, rule, -1,
860 co_list, head_p, tail_p);
864 while ((*l != '\0') && ITEM_SEP(*l))
867 if (*l == '\0') break; /* done */
873 STACK_OF(SSL_CIPHER) *ssl_create_cipher_list(const SSL_METHOD *ssl_method,
874 STACK_OF(SSL_CIPHER) **cipher_list,
875 STACK_OF(SSL_CIPHER) **cipher_list_by_id,
876 const char *rule_str)
878 int ok, num_of_ciphers, num_of_alias_max, num_of_group_aliases;
879 unsigned long disabled_mask;
880 STACK_OF(SSL_CIPHER) *cipherstack, *tmp_cipher_list;
882 CIPHER_ORDER *co_list = NULL, *head = NULL, *tail = NULL, *curr;
883 SSL_CIPHER **ca_list = NULL;
886 * Return with error if nothing to do.
888 if (rule_str == NULL || cipher_list == NULL || cipher_list_by_id == NULL)
892 * To reduce the work to do we only want to process the compiled
893 * in algorithms, so we first get the mask of disabled ciphers.
895 disabled_mask = ssl_cipher_get_disabled();
898 * Now we have to collect the available ciphers from the compiled
899 * in ciphers. We cannot get more than the number compiled in, so
900 * it is used for allocation.
902 num_of_ciphers = ssl_method->num_ciphers();
904 printf("ssl_create_cipher_list() for %d ciphers\n", num_of_ciphers);
905 #endif /* KSSL_DEBUG */
906 co_list = (CIPHER_ORDER *)OPENSSL_malloc(sizeof(CIPHER_ORDER) * num_of_ciphers);
909 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
910 return(NULL); /* Failure */
913 ssl_cipher_collect_ciphers(ssl_method, num_of_ciphers, disabled_mask,
914 co_list, &head, &tail);
917 * We also need cipher aliases for selecting based on the rule_str.
918 * There might be two types of entries in the rule_str: 1) names
919 * of ciphers themselves 2) aliases for groups of ciphers.
920 * For 1) we need the available ciphers and for 2) the cipher
921 * groups of cipher_aliases added together in one list (otherwise
922 * we would be happy with just the cipher_aliases table).
924 num_of_group_aliases = sizeof(cipher_aliases) / sizeof(SSL_CIPHER);
925 num_of_alias_max = num_of_ciphers + num_of_group_aliases + 1;
927 (SSL_CIPHER **)OPENSSL_malloc(sizeof(SSL_CIPHER *) * num_of_alias_max);
930 OPENSSL_free(co_list);
931 SSLerr(SSL_F_SSL_CREATE_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
932 return(NULL); /* Failure */
934 ssl_cipher_collect_aliases(ca_list, num_of_group_aliases, disabled_mask,
938 * If the rule_string begins with DEFAULT, apply the default rule
939 * before using the (possibly available) additional rules.
943 if (strncmp(rule_str,"DEFAULT",7) == 0)
945 ok = ssl_cipher_process_rulestr(SSL_DEFAULT_CIPHER_LIST,
946 co_list, &head, &tail, ca_list);
952 if (ok && (strlen(rule_p) > 0))
953 ok = ssl_cipher_process_rulestr(rule_p, co_list, &head, &tail,
956 OPENSSL_free(ca_list); /* Not needed anymore */
959 { /* Rule processing failure */
960 OPENSSL_free(co_list);
964 * Allocate new "cipherstack" for the result, return with error
965 * if we cannot get one.
967 if ((cipherstack = sk_SSL_CIPHER_new_null()) == NULL)
969 OPENSSL_free(co_list);
974 * The cipher selection for the list is done. The ciphers are added
975 * to the resulting precedence to the STACK_OF(SSL_CIPHER).
977 for (curr = head; curr != NULL; curr = curr->next)
981 sk_SSL_CIPHER_push(cipherstack, curr->cipher);
983 printf("<%s>\n",curr->cipher->name);
987 OPENSSL_free(co_list); /* Not needed any longer */
989 tmp_cipher_list = sk_SSL_CIPHER_dup(cipherstack);
990 if (tmp_cipher_list == NULL)
992 sk_SSL_CIPHER_free(cipherstack);
995 if (*cipher_list != NULL)
996 sk_SSL_CIPHER_free(*cipher_list);
997 *cipher_list = cipherstack;
998 if (*cipher_list_by_id != NULL)
999 sk_SSL_CIPHER_free(*cipher_list_by_id);
1000 *cipher_list_by_id = tmp_cipher_list;
1001 sk_SSL_CIPHER_set_cmp_func(*cipher_list_by_id,ssl_cipher_ptr_id_cmp);
1003 return(cipherstack);
1006 char *SSL_CIPHER_description(SSL_CIPHER *cipher, char *buf, int len)
1008 int is_export,pkl,kl;
1009 const char *ver,*exp_str;
1010 const char *kx,*au,*enc,*mac;
1011 unsigned long alg,alg2,alg_s;
1013 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s AL=%lx\n";
1015 static const char *format="%-23s %s Kx=%-8s Au=%-4s Enc=%-9s Mac=%-4s%s\n";
1016 #endif /* KSSL_DEBUG */
1018 alg=cipher->algorithms;
1019 alg_s=cipher->algo_strength;
1020 alg2=cipher->algorithm2;
1022 is_export=SSL_C_IS_EXPORT(cipher);
1023 pkl=SSL_C_EXPORT_PKEYLENGTH(cipher);
1024 kl=SSL_C_EXPORT_KEYLENGTH(cipher);
1025 exp_str=is_export?" export":"";
1027 if (alg & SSL_SSLV2)
1029 else if (alg & SSL_SSLV3)
1034 switch (alg&SSL_MKEY_MASK)
1037 kx=is_export?(pkl == 512 ? "RSA(512)" : "RSA(1024)"):"RSA";
1045 case SSL_kKRB5: /* VRS */
1046 case SSL_KRB5: /* VRS */
1053 kx=is_export?(pkl == 512 ? "DH(512)" : "DH(1024)"):"DH";
1057 kx=is_export?"ECDH(<=163)":"ECDH";
1066 switch (alg&SSL_AUTH_MASK)
1077 case SSL_aKRB5: /* VRS */
1078 case SSL_KRB5: /* VRS */
1096 switch (alg&SSL_ENC_MASK)
1099 enc=(is_export && kl == 5)?"DES(40)":"DES(56)";
1105 enc=is_export?(kl == 5 ? "RC4(40)" : "RC4(56)")
1106 :((alg2&SSL2_CF_8_BYTE_ENC)?"RC4(64)":"RC4(128)");
1109 enc=is_export?(kl == 5 ? "RC2(40)" : "RC2(56)"):"RC2(128)";
1121 switch(cipher->strength_bits)
1123 case 128: enc="AES(128)"; break;
1124 case 192: enc="AES(192)"; break;
1125 case 256: enc="AES(256)"; break;
1126 default: enc="AES(?""?""?)"; break;
1130 switch(cipher->strength_bits)
1132 case 128: enc="Camellia(128)"; break;
1133 case 256: enc="Camellia(256)"; break;
1134 default: enc="Camellia(?""?""?)"; break;
1143 switch (alg&SSL_MAC_MASK)
1159 buf=OPENSSL_malloc(len);
1160 if (buf == NULL) return("OPENSSL_malloc Error");
1163 return("Buffer too small");
1166 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str,alg);
1168 BIO_snprintf(buf,len,format,cipher->name,ver,kx,au,enc,mac,exp_str);
1169 #endif /* KSSL_DEBUG */
1173 char *SSL_CIPHER_get_version(const SSL_CIPHER *c)
1177 if (c == NULL) return("(NONE)");
1178 i=(int)(c->id>>24L);
1180 return("TLSv1/SSLv3");
1187 /* return the actual cipher being used */
1188 const char *SSL_CIPHER_get_name(const SSL_CIPHER *c)
1195 /* number of bits for symmetric cipher */
1196 int SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits)
1202 if (alg_bits != NULL) *alg_bits = c->alg_bits;
1203 ret = c->strength_bits;
1208 SSL_COMP *ssl3_comp_find(STACK_OF(SSL_COMP) *sk, int n)
1213 if ((n == 0) || (sk == NULL)) return(NULL);
1214 nn=sk_SSL_COMP_num(sk);
1215 for (i=0; i<nn; i++)
1217 ctmp=sk_SSL_COMP_value(sk,i);
1224 #ifdef OPENSSL_NO_COMP
1225 void *SSL_COMP_get_compression_methods(void)
1229 int SSL_COMP_add_compression_method(int id, void *cm)
1234 const char *SSL_COMP_get_name(const void *comp)
1239 STACK_OF(SSL_COMP) *SSL_COMP_get_compression_methods(void)
1241 load_builtin_compressions();
1242 return(ssl_comp_methods);
1245 int SSL_COMP_add_compression_method(int id, COMP_METHOD *cm)
1249 if (cm == NULL || cm->type == NID_undef)
1252 /* According to draft-ietf-tls-compression-04.txt, the
1253 compression number ranges should be the following:
1255 0 to 63: methods defined by the IETF
1256 64 to 192: external party methods assigned by IANA
1257 193 to 255: reserved for private use */
1258 if (id < 193 || id > 255)
1260 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE);
1265 comp=(SSL_COMP *)OPENSSL_malloc(sizeof(SSL_COMP));
1268 load_builtin_compressions();
1269 if (ssl_comp_methods
1270 && !sk_SSL_COMP_find(ssl_comp_methods,comp))
1274 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,SSL_R_DUPLICATE_COMPRESSION_ID);
1277 else if ((ssl_comp_methods == NULL)
1278 || !sk_SSL_COMP_push(ssl_comp_methods,comp))
1282 SSLerr(SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD,ERR_R_MALLOC_FAILURE);
1292 const char *SSL_COMP_get_name(const COMP_METHOD *comp)